F5 Networks, which specializes in layer 7 traffic management solutions, has enhanced its BIG-IP appliance to help mobile operators scale their authentication, authorization, and accounting (AAA) infrastructure, without incurring the costly and time-consuming process of replacing existing AAA servers. 
- Support for Diameter and RADIUS protocols — New traffic profiles and monitors specifically for Diameter and RADIUS traffic allow service providers to take advantage of the benefits of layer 7 traffic management — including load balancing, inspection, redirection, high availability, and simplified scaling — for their AAA infrastructure.
- On-demand capacity to handle highest levels of traffic — To help carriers manage massive volumes of revenue-generating traffic, F5 is introducing PB 200 blades for its VIPRION chassis. VIPRION and PB 200 blades provide the throughput needed today as well as a simple method for adding on-demand capacity to future-proof a carriers’ infrastructure.
- Carrier-class availability with Fast Failover — New failover methods use a combination of metrics to determine when to switch to the standby unit, and reduce the failover time to fractions of a second. Fast Failover, combined with new monitors and carrier-grade hardware, can significantly reduce downtime.
- Seamless strategy for staging network migration as IPv6 traffic grows — The BIG-IP IPv6 Gateway feature ensures a carriers’ ability to leverage the scalability of IPv6 for all their mobile devices, while still connecting to legacy IPv4 networks.
- Total traffic control with iRules — F5’s powerful event-driven programming language, iRules, allows system integrators to integrate BIG-IP into their total solution, providing advanced, customized traffic management, such as policy-based traffic steering.
http://www.f5.com/products/big-ip